Number Base Converter
Developer ToolsBinary / Octal / Decimal / Hex
Embed this tool on your websiteFree
- Choose how tall the frame should be.
- Press Copy code.
- Paste it into your page, blog, WordPress or Notion HTML block.
The tool runs inside your visitor's browser, nothing is uploaded, and a small "Powered by ToolCloak" line stays under it. The second line (script) is optional: it makes the frame fit the tool's height.
Similar tools you may like
History
All history →Number Base Converter — at a glance
Convert a number between binary, octal, decimal and hexadecimal. Type in any box and the rest update.
How to use it — step by step
Useful for programming, networking, electronics and computer science homework.
Type a number
Enter it in whichever base you know — binary, octal, decimal or hex.
See all bases
The other three fields fill in automatically.
Copy
Copy any value you need.
Pro tips
Small things that make the result better.
Quick facts
Frequently Asked Questions
Why do computers use binary?+
Electronic circuits have two states — on and off — which map perfectly to 1 and 0.
Why is hex popular?+
One hex digit equals exactly 4 binary digits, so long binary numbers become short and readable.
Does it support negative numbers or fractions?+
It is built for whole positive numbers.
Is this tool really free?+
Yes — completely free, no signup, no watermark and no usage limit.